linux/drivers/pinctrl/pinconf-generic.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Core driver for the generic pin config portions of the pin control subsystem
 *
 * Copyright (C) 2011 ST-Ericsson SA
 * Written on behalf of Linaro for ST-Ericsson
 *
 * Author: Linus Walleij <[email protected]>
 */

#define pr_fmt(fmt) …

#include <linux/array_size.h>
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <linux/seq_file.h>

#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinctrl.h>

#include "core.h"
#include "pinconf.h"
#include "pinctrl-utils.h"

#ifdef CONFIG_DEBUG_FS
static const struct pin_config_item conf_items[] = …;

static void pinconf_generic_dump_one(struct pinctrl_dev *pctldev,
				     struct seq_file *s, const char *gname,
				     unsigned int pin,
				     const struct pin_config_item *items,
				     int nitems, int *print_sep)
{ … }

/**
 * pinconf_generic_dump_pins - Print information about pin or group of pins
 * @pctldev:	Pincontrol device
 * @s:		File to print to
 * @gname:	Group name specifying pins
 * @pin:	Pin number specyfying pin
 *
 * Print the pinconf configuration for the requested pin(s) to @s. Pins can be
 * specified either by pin using @pin or by group using @gname. Only one needs
 * to be specified the other can be NULL/0.
 */
void pinconf_generic_dump_pins(struct pinctrl_dev *pctldev, struct seq_file *s,
			       const char *gname, unsigned int pin)
{ … }

void pinconf_generic_dump_config(struct pinctrl_dev *pctldev,
				 struct seq_file *s, unsigned long config)
{ … }
EXPORT_SYMBOL_GPL(…);
#endif

#ifdef CONFIG_OF
static const struct pinconf_generic_params dt_params[] = …;

/**
 * parse_dt_cfg() - Parse DT pinconf parameters
 * @np:	DT node
 * @params:	Array of describing generic parameters
 * @count:	Number of entries in @params
 * @cfg:	Array of parsed config options
 * @ncfg:	Number of entries in @cfg
 *
 * Parse the config options described in @params from @np and puts the result
 * in @cfg. @cfg does not need to be empty, entries are added beginning at
 * @ncfg. @ncfg is updated to reflect the number of entries after parsing. @cfg
 * needs to have enough memory allocated to hold all possible entries.
 */
static void parse_dt_cfg(struct device_node *np,
			 const struct pinconf_generic_params *params,
			 unsigned int count, unsigned long *cfg,
			 unsigned int *ncfg)
{ … }

/**
 * pinconf_generic_parse_dt_config()
 * parse the config properties into generic pinconfig values.
 * @np: node containing the pinconfig properties
 * @pctldev: pincontrol device
 * @configs: array with nconfigs entries containing the generic pinconf values
 *           must be freed when no longer necessary.
 * @nconfigs: number of configurations
 */
int pinconf_generic_parse_dt_config(struct device_node *np,
				    struct pinctrl_dev *pctldev,
				    unsigned long **configs,
				    unsigned int *nconfigs)
{ … }
EXPORT_SYMBOL_GPL(…);

int pinconf_generic_dt_subnode_to_map(struct pinctrl_dev *pctldev,
		struct device_node *np, struct pinctrl_map **map,
		unsigned int *reserved_maps, unsigned int *num_maps,
		enum pinctrl_map_type type)
{ … }
EXPORT_SYMBOL_GPL(…);

int pinconf_generic_dt_node_to_map(struct pinctrl_dev *pctldev,
		struct device_node *np_config, struct pinctrl_map **map,
		unsigned int *num_maps, enum pinctrl_map_type type)
{ … }
EXPORT_SYMBOL_GPL(…);

void pinconf_generic_dt_free_map(struct pinctrl_dev *pctldev,
				 struct pinctrl_map *map,
				 unsigned int num_maps)
{ … }
EXPORT_SYMBOL_GPL(…);

#endif